Rock crusher or breaker



(No Model.)

F. A. HUNTINGTON.

BOOK ORUSHEROR BREAKER.

No. 324,937. Patented Aug. 25; 1885.

Mica

N. PETERS. PIwlu-hlh UNITED STATES PATENT Orrica FRANK A. HUNTINGTON, OF SAN FRANCISCO, CALIFORNIA.

ROCK CRUSHER OR BREAKER.

SFPECIPICATION forming part of Letters Patent No. 324,937, dated August 25,1885.

(No model.)

To all whom it may concern:

Be itknown that I, FRANKA. HUNTINGTON, of the city of San Francisco, in the county of San Francisco and State of California, have invented an Improvement in Rock Crushers or Breakers; and I hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to an apparatus for breaking or crushing rock or other similar material.

It consists in the combination of devices hereinafter described and claimed.

Referring to the accompanying drawings for a more complete explanation of my invention, Figure 1 is a side elevation of my improved rock-crusher. Fig. 2 is a vertical section taken in a plane longitudinally through the axes of the shaft.

A is a fixed jaw, which may be of any material sufficiently strong to resist the opera tion of crushing, and which is snpportednpon a suitable frame-work, B. The upper end of this jaw may be supported in any suitable manner. In the present case I have shown it as supported upon a strong transverse shaft or bolt, 0, and the lower end rests upon a square bar, D. It may be raised so as to approach the opposite crushing-face as fast as it becomes worn by the introduction of plates E between the upper side of this bar and the back of the die A. The actual crushing-face of this die consists of a shoe, F, the inner surface of which is curved to a radius greater than that of the opposing cylindrical crushing-face, and its back is of the same curve as the die A, against which it fits. The upper part of this shoe, which is bolted to the die A, has a projecting lug, G, which extends across its face for a purpose to be hereinafter described.

H is a cylinder, which is mounted upon a shaft, I, upon which it turns loosely. That part of the shaft which passes through the cylinder H is made eccentric to the portion which turns in the j ournal-boxes, and it turns loosely within the cylinder, so that when the shaft is rotated its action is to move the cylinder in a small circle. The. shaft I is journaled in a horizontal plane, preferably below the middle of the shoe F of the stationary crushing-jaw, so that the space between the upper part of this stationary shoe and the cylinder is considerably greater than the space between its lower portion and the cylinder, as shown.

J is a bushing or sleeve fitted within the cylinder H, so that the shaft I turns withinit, and this bushing has considerable length, so as to have a long bearing-surface on the shaft and prevent rapid wear. XVhatever wear does occur will take place on this bushing, which is keyed within the cylinder. \Vhenever the bushing is worn out it can be easily replaced with another. Lubrication between this bushing and the eccentric shaft may be effected through a hole bored longitudinally into the shaft, and having small holes, L, extending from it to the space between the shaft and bushing. This hole may be filled with any suitable lubricator and the outer end plugged up, when it will run for aconsiderablelength of time without further attention.

M M are small oil-holes, also made through the hub of the cylinder, through which the oil may be introduced for the same purpose, if desired. Upon the exterior of this cylinder H is secured'a ring, die, or shoe, N, which may be made of wrought-iron, steel, cast-steel, or other suitable tough material which will resist the action of the rock between itself and the fixed die F. This ring die may either be shrunk upon the cylinder or made loose and the space filled with lead or other material, or it may be made in sections and bolted on.

0 represents a hopper, through which the rock or material to be crushed is fed into the space between the fixed die F and the die N on the rotary cylinder.

The shaft I is caused to rotate by means of a belt upon the pulley P, or by any suitable means for driving the shaft. The operation will then be as follows: The cylinder H is carried around in a small circle by the rotation of the eccentric shaft I, and alternately approaches to'and recedes from the fixed die F, so that any rock which falls between the two will be broken in the upper part, fall a little lower and be again broken, and so on, being reduced at each descent until it reaches the narrowest space between the two, where it can pass out. The lug or projection G, at the upper side of the shoe F, is important, because it prevents rock from being forced outward when the cylinder approaches the shoe, the rock being held beneath this projection until it can be acted on and crushed by the movement of the cylinder. Itwillbe seen that if the rotation of the shaft Iis upward on the side toward the fixed shoe that the cylinder will approach the lower part of the die F first and the upper part afterward; but if the rotation be in the opposite (lirection,or down ward on the side toward the fixed die, the upper part of the cylinder will approach this die first and the lower part afterward. As the cylinder or its interior bushing turns loosely upon the shaft, it will be seen that the action of the cylinder will simply be to approach and recede from the fixed jaw without partaking of the revolving movement of the shaft. There will, however, be a slight forward movement of the cylinder in the direction of the rotation of the shaft at each forwa d and back ward movement with relation to the die, so that the cylinder always presents a-new face to act against tlre rock between the two, and will gradually complete the revolution. The

A crushing apparatus comprising a frame provided with a hopper, an eccentric shaft, a loosecylinderuponsaidshaft,afixedjawformed with a projection, G, the bolt 0, bar D, and plates E, substantially as and for the purpose specified.

y In witness whereof I have hereunto set my hand.

FRANK A. HUNTINGTON.

Vitncsscs:

O. D. Conn, J. H. BLooD. 

